Regulations Governing the Establishment and Management of Customs Brokers Article 9

The customs authority issues a customs broker operating license to all approved customs broker establishment applications; moreover, the customs authority shall conduct a calibration procedure every five years. The presentation of a calibration stamp or documents from the local customs brokers association is required during the calibration procedure.In the event that a customs broker should lose its operating license, broker is required to apply for a replacement license.
中文原文 報關業設置管理辦法第9條
經核准設置之報關業,由海關發給報關業務證照,並應每五年向海關辦理校正一次。
校正時應有當地報關商業同業公會之校正簽章或文件。
前項證照遺失時,應即申請補發。

English translation for reference only; the Chinese text prevails. Not legal advice.